Adsorption-energetic and IR spectroscopic studies of NH4 natrolite |
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| Authors: | D I Mirzai T M Guliev V N Akhmedov A A Isirikyan |
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| Institution: | (1) Institute of Inorganic and Physical Chemistry, Azerbaidzhan Academy of Sciences, 29 prosp. G. Dzhavida, 370143 Baku, Azerbaidzhan;(2) Institute of Physical Chemistry, Russian Academy of Sciences, 31 Leninsky prosp., 117915 Moscow, Russian Federation |
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| Abstract: | The ammonium form of natural zeolite, natrolite, obtained by vapor phase ion exchange is similar to calcium-containing zeolites
of the natrolite group in its de- and rehydration characteristics and the heats of immersion in water. The adsorption capacity
and the heat of immersion in water are maximum after evacuation of the zeolite at 200 °C. The irreversible sintering of NH4 natrolite occurs above 200 °C (up to 45% at 500 °C), accompanied by the formation of hydroxyl groups.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 359–361, February, 1998. |
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| Keywords: | zeolites natrolite NH4 natrolite H natrolite water adsorption IR spectra heat of immersion ion exchange |
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